{{Infobox/Yu-Gi-Oh!/Charactercharacter | image name = GXx013 Doctor.jpg | english name unnamed = true| en_name = Doctor | japanese name ja_name = 博士 | romaji name romaji_name = Hakase | anime debut anime_debut = {{episode|Yu-Gi-Oh! GX|13|ref}} | appears anime appears_in_anime = ''[[Yu-Gi-Oh! GX]]'' | gender = Male | japanese en_voice = {{voice actors|en|Maddie Blaustein}}| ja_voice = {{voice actors|ja|Ren Tamura|e1=<ref>[http://www5f.biglobe.ne.jp/~flying-in-the-sky/on-air-data.htm biglobe.ne.jp] ''Yu-Gi-Oh! Duel Monsters GX'' staff and cast</ref>}} | english voice =

The '''doctor''' is a character in ''[[Yu-Gi-Oh! GX]]'', who unethically used the monkey [[Wheeler]] in a dueling Dueling learning program.

The doctor trained the monkey [[Wheeler]] as a duelistDuelist. After Wheeler escaped from [[SAL lab|the lab]], he , [[Tatewaki]] and two a man armed men with a tranquilizer gun tracked him down and found he had taken [[Jasmine]] captive. They explained some of their project to Jasmine's friends and [[Jaden Yuki]] challenged Wheeler to a Duel for Jasmine's freedom. During the Duel, Jaden realized how poorly the doctor had been treating Wheeler and keeping him away from his family and asked that Wheeler be let free. The doctor then offered to let Wheeler be with his family, by taking them to the lab too. He ordered the armed men man to capture the other monkeys, but [[Lyman Banner]] and [[Pharaoh]] interrupted. Banner threatened to report the doctor and his men for animal abuse, leaving them no choice but to free Wheeler.<ref>{{episode|Yu-Gi-Oh! GX|13|ref}}</ref>